Question

calculate the mass of Pbl2 produced by reacting of 30.0g Kl with excess Pb( NO3)2

Answer 1

Pb(NO3)2 + 2KI ==> PbI2 + 2KNO3

mols KI = grams/molar mass = ?
mols PbI2 = 1/2 mols KI
mass PbI2 = mols PbI2 x molar mass PbI2